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MIPS: move unselectable entries out of the "CPU type" choice 

Move the following entries out of the "CPU type" choice:

 - LOONGSON3_ENHANCEMENT
 - CPU_LOONGSON3_WORKAROUNDS
 - CPU_LOONGSON3_CPUCFG_EMULATION

These entries cannot be selected from the choice because they depend on
CPU_LOONGSON64, which is also located in the same choice.

In fact, Kconfig does not consider them as choice values because they
become children of CPU_LOOONGSON64 due to the automatic submenu creation
in menu_finalize().

However, it is hard to understand this behavior unless you are familiar
with the Kconfig internals.

"choice" should contain only selectable entries.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Masahiro Yamada 2024-01-28 01:23:09 +09:00 committed by Thomas Bogendoerfer
parent 5b7236c198
commit 5033ad5660
1 changed files with 38 additions and 38 deletions
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76
arch/mips/Kconfig
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@ -1328,44 +1328,6 @@ config CPU_LOONGSON64
3B1000, 3B1500, 3A2000, 3A3000 and 3A4000) processors. However, old
Loongson-2E/2F is not covered here and will be removed in future.
config LOONGSON3_ENHANCEMENT
bool "New Loongson-3 CPU Enhancements"
default n
depends on CPU_LOONGSON64
help
New Loongson-3 cores (since Loongson-3A R2, as opposed to Loongson-3A
R1, Loongson-3B R1 and Loongson-3B R2) has many enhancements, such as
FTLB, L1-VCache, EI/DI/Wait/Prefetch instruction, DSP/DSPr2 ASE, User
Local register, Read-Inhibit/Execute-Inhibit, SFB (Store Fill Buffer),
Fast TLB refill support, etc.
This option enable those enhancements which are not probed at run
time. If you want a generic kernel to run on all Loongson 3 machines,
please say 'N' here. If you want a high-performance kernel to run on
new Loongson-3 machines only, please say 'Y' here.
config CPU_LOONGSON3_WORKAROUNDS
bool "Loongson-3 LLSC Workarounds"
default y if SMP
depends on CPU_LOONGSON64
help
Loongson-3 processors have the llsc issues which require workarounds.
Without workarounds the system may hang unexpectedly.
Say Y, unless you know what you are doing.
config CPU_LOONGSON3_CPUCFG_EMULATION
bool "Emulate the CPUCFG instruction on older Loongson cores"
default y
depends on CPU_LOONGSON64
help
Loongson-3A R4 and newer have the CPUCFG instruction available for
userland to query CPU capabilities, much like CPUID on x86. This
option provides emulation of the instruction on older Loongson
cores, back to Loongson-3A1000.
If unsure, please say Y.
config CPU_LOONGSON2E
bool "Loongson 2E"
depends on SYS_HAS_CPU_LOONGSON2E
@ -1703,6 +1665,44 @@ config CPU_BMIPS
endchoice
config LOONGSON3_ENHANCEMENT
bool "New Loongson-3 CPU Enhancements"
default n
depends on CPU_LOONGSON64
help
New Loongson-3 cores (since Loongson-3A R2, as opposed to Loongson-3A
R1, Loongson-3B R1 and Loongson-3B R2) has many enhancements, such as
FTLB, L1-VCache, EI/DI/Wait/Prefetch instruction, DSP/DSPr2 ASE, User
Local register, Read-Inhibit/Execute-Inhibit, SFB (Store Fill Buffer),
Fast TLB refill support, etc.
This option enable those enhancements which are not probed at run
time. If you want a generic kernel to run on all Loongson 3 machines,
please say 'N' here. If you want a high-performance kernel to run on
new Loongson-3 machines only, please say 'Y' here.
config CPU_LOONGSON3_WORKAROUNDS
bool "Loongson-3 LLSC Workarounds"
default y if SMP
depends on CPU_LOONGSON64
help
Loongson-3 processors have the llsc issues which require workarounds.
Without workarounds the system may hang unexpectedly.
Say Y, unless you know what you are doing.
config CPU_LOONGSON3_CPUCFG_EMULATION
bool "Emulate the CPUCFG instruction on older Loongson cores"
default y
depends on CPU_LOONGSON64
help
Loongson-3A R4 and newer have the CPUCFG instruction available for
userland to query CPU capabilities, much like CPUID on x86. This
option provides emulation of the instruction on older Loongson
cores, back to Loongson-3A1000.
If unsure, please say Y.
config CPU_MIPS32_3_5_FEATURES
bool "MIPS32 Release 3.5 Features"
depends on SYS_HAS_CPU_MIPS32_R3_5